Yamaha YZ450F(S), Owner'S Service Manual

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ENG
BALANCER
REMOVAL POINTS
Balancer drive gear and balancer driven
gear
1. Straighten the lock washer tab.
2. Loosen:
●
Nut (primary drive gear) 1
●
Nut (balancer) 2
NOTE:
Place an aluminum plate
a
between the teeth
of the balancer drive gear 3 and driven gear
4 .
Balancer
1. Remove:
●
Balancer 1
NOTE:
When removing the balancer shaft, align the
center of the balancer shaft weight
a
along
the line connecting the centers of the crank-
shaft and balancer shaft.
INSPECTION
Primary drive gear, balancer drive gear and
balancer driven gear
1. Inspect:
●
Primary drive gear 1
●
Balancer drive gear 2
●
Balancer driven gear 3
Wear/damage
→
Replace.
Balancer
1. Inspect:
●
Balancer
Cracks/damage
→
Replace.